preTrade(agentAgent, partnerAgent, good1str, amt1num, amt2num)

Runs before an agent completes a trade of one good for another. Note that because agent.buy() aliases agent.trade(), this hook will also run when agents buy using the monetary good as well.

Required Parameters

• agent — Agent

  The agent initiating the trade.

• partner — Agent

  The trading partner of the agent.

• good1 — str

  The name of the good being given up (if amt1>0) or received (if amt1<0).

• amt1 — num

  The amount of good1 being traded.

• good2 — str

  The name of the good being received (if amt2>0) or given up (if amt2<0).

• amt2 — num

  The amount of good2 being traded.